Notes, summaries, assignments, exams, and problems for Secondary education

Clasificación de las palabras

Según su significado

• Sustantivos: nombran objetos, seres o ideas (ej. libro, árbol, bondad).
• Adjetivos: expresan cualidades (ej. pequeño, frondoso, verde).
• Verbos: establecen acciones, estados o procesos (ej. acompañar, ser, madurar).
• Adverbios: indican circunstancias de lugar, tiempo, modo, etc. (ej. aquí, ahora, lentamente).

Según su forma

• Variables: cambian su forma (ej. ciudad/ciudades, nadaba/nadábamos).
• Invariables: no cambian de forma (ej. por, pero, además).
• Simples: formadas por un solo monema (ej. agua, nube, y, por).
• Compuestas: formadas por más de un lexema (ej. lavaplatos, parachoques).
• Primitivas: no contienen ningún morfema derivativo (ej. casa, perro).
• Derivadas: contienen prefijos, infijos o sufijos

*UNIT.5: *Vocabulary: Paint (pintar), Draw (dibujar), Sketch (boceto), Sculpt (escultura), Sew (coser), Decorate (decorar), Create (crear), Recycle (reciclar), Display (exponer), Portrait (retrato), Exhibition (exhibición), Masterpiece (obra maestra), Wood (madera), Glass (cristal), Cloth (tela), Dress (vestido/vestirse), Write (escribir), Fortunately (afortunadamente), Possible (posible), Expensive (caro), Hear (oir), Start (empezar), Close (cerrar), Eat (comer), Travel (viajar), Incident (hecho), Discard (tirar la basura). *Words To Know.1: Obviously (obviamente), Wrapping (envoltorio), Host (ofrecer), Supposed (suponer (que)), Worth (merecer la pena), Spot (reconocer). *Words To Know.2: Waste (desperdiciar/residuo), Hubcap (tapacubos),... Continue reading "Lengu te,a" »

Travel and Lifestyle Vocabulary

• Travel: beach holiday, city break, travel companion, return flight, winter sports, train ticket, five-star accommodation, luxury hotel, day trip.

Verbs and Phrasal Verbs

• Common Verbs: borrow (pedir prestado), lend (dejar), look (mirar), see (ver), watch (mirar en movimiento).
• Phrasal Verbs: get on (subir), get off (bajar), set off (salir), come back (volver), come across (encontrar), turn back (tornar enrere), stop off (parar), put up (alojarse), put on (ponerse), take off (treure).

Adjectives and Descriptors

• Style: smart-casual (elegante/deportivo), fashionable vs. old-fashioned (de moda), tight vs. baggy (apretado/holgado).
• Qualities: comfortable vs. uncomfortable (cómodo/incómodo), impractical vs. practical (práctico/

Understanding Earth's Atmosphere

Atmospheric Composition Evolution

Primitive Atmosphere: Composed of water vapor, carbon dioxide, nitrogen, hydrogen, ammonia, methane, and other oxides, but notably *no oxygen*.

Present Atmosphere: Consists of approximately 78% nitrogen, 21% oxygen, 1% carbon dioxide, water vapor, and trace gases like argon. The ozone layer later formed from oxygen.

Atmospheric Layers (In Order)

• Ionosphere: Temperature around 1,000 ºC.
• Mesosphere: Approximately 40 km thick.
• Stratosphere: Approximately 30 km thick. Temperature increases from 0 ºC at its upper limit to 70 ºC at its lower limit (Note: The original text stated an increase *to* 0ºC, which is inconsistent with standard models; this reflects the general structure).
• Troposphere:

Structure of the Plasma Membrane

Membrane Amphipathic Properties

The plasma membrane is amphipathic:

• Fatty acid tails are hydrophobic (repel water).
• Phosphate head groups are hydrophilic (attract water).

Transport Through the Membrane

Factors Affecting Transport

• The concentration of substances.
• The type of molecules.

Transport Mechanisms

Based on these factors, transport can occur by three phenomena:

• Passive transport
• Active transport
• Vesicle-mediated transport

Passive Transport

In passive transport, molecules move down their concentration gradient: from regions of higher concentration to regions of lower concentration. The cell does not expend energy; the process occurs spontaneously.

Types of Passive Transport

• Simple diffusion
• Osmosis
• Facilitated diffusion

Simple

Nutrition, Mobility and Cell Characteristics

Nutrition

Nutrition: Variety — plants (autotrophs), animals (heterotrophs).

Mobility

Mobility: Variety — plants (immobile), animals (mobile).

Growth

Growth: Plants (often indeterminate / unlimited), animals (typically determinate / limited).

Cellular Coverings

Cell coverings: Plants: cell wall and cell membrane; Animals: plasma membrane.

Similarities of Living Beings

Similarities: assimilation, sensitivity, autoregulation and reproduction.

Cell Composition and Organelles

Cell composition: Life composed of abundant protoplasm; cells possess a cell membrane, cytoplasm, and a nuclear membrane (karyotheca) with a nucleus.

There are a variety of structures in the cytoplasm (organelles): ribosomes, endoplasmic

Mystery and Paranormal Tales

The Scottish Castle Encounter

Gordon, Duncan, Fiona, and Heather visited Fiona's uncle in a Scottish castle. While sleeping on the fourth floor, they encountered the spirit of the uncle's ancestor. The ghost brandished a sword, leading to a tense confrontation.

The Astronaut's Digital Message

Anna, an aspiring NASA astronaut, received a computer from her uncle. She began receiving mysterious messages from an astronaut who had passed away ten years prior.

The Haunted House Mystery

Sally and her family lived in an old house where the kitchen was frequently found in disarray. The grandmother believed the culprit was her late husband. Eventually, the house crumbled to the ground, revealing footprints belonging to the grandmother'... Continue reading "Short Stories of Mystery and Paranormal Encounters" »

.All material objects are composed of atoms. An atom consists of a nucleus and a vast region of space outside the nucleus. Electrons are present in the region of space outside the nuclues. Electrons are often removed from and a dded to an atom by normal everyday occurrences. The nucleus contains positively-chargedd protons and nuetral neutrons. These prtons and nuentrons are not removable or disturbable by usual everyday methods. One sure truth of this unit is that the porotn and neutron will remain within the nucleus of the atom.
Methods of charging:-friction:Having an excess of electrons thr rubber ballon is charged negatively.The shortage of electrons on the animal fur leaves it with a positive charge.-Induction: is a very common method of... Continue reading "Basic Principles of Electricity and Atomic Physics" »